The Quadral Power Cube Sub 300 is a compact yet powerful active bass reflex subwoofer designed for enriching home audio experiences. Its dimensions are 423x305x400 mm, and it weighs a significant amount, providing stability and a solid acoustic foundation. The design features a robust chassis with thick walls supported by wide metal legs, which are equipped with rubber pads for effective vibration isolation. The subwoofer boasts a 260 mm bass driver with a rigid polymer diaphragm set in a resilient butyl suspension and utilizes a flat membrane design. Additionally, it includes a passive radiator mounted on the bottom with a matching 260 mm diaphragm for enhanced sound performance. The aesthetics are complemented by a gently sloped top and a removable silver grille. Control options are located at the rear, featuring standard adjustments for level and crossover frequency (50-150 Hz), as well as a phase switch (0/180 degrees). The device supports automatic operation mode, allowing it to switch off during prolonged inactivity. Input options are versatile, including both line-level RCA and high-level connections. The built-in digital amplifier delivers nominal power of 300 W, with a peak output reaching 600 W. The frequency response ranges from 22 Hz to 150 Hz, allowing the subwoofer to produce deep bass sounds efficiently.
